Under Ian Harebottle, Gemfields has helped breathe new life into the emerald trade. Now he’s set his sights on the entire colored stone world.South Africa–born Ian Harebottle became CEO of Gemfields in 2009, after previously heading Tanzanite-­One. Since coming on board, he has laid out an ambitious agenda to make the London-based mining company the “De Beers of colored stones,” with an emphasis on ethical mining and sustainability at its Kagem emerald mine in Zambia and Montepuez ruby mine in Mozambique. In 2012, Gemfields purchased legendary ­jeweler Fabergé.He talks to JCK about dealing with different cultures, the importance of passion, and how success in business is like finding the right love.Is there a piece of management wisdom that you live by?I like [Virgin Group chairman] Richard Branson’s “Always use people younger and smarter than you.” I am astounded by th